1. Institute of Pathology; Faculty of Medicine; University of Ljubljana; Ljubljana Slovenia
2. Institute of Pathology; Medical University of Graz; Graz Austria
3. Institute of Microbiology and Immunology; Faculty of Medicine; University of Ljubljana; Ljubljana Slovenia
4. University Hospital in Hradec Kralove; Hradec Králové Czech Republic
5. Sikl's Department of Pathology; Medical Faculty Hospital; Charles University; Pilsen Czech Republic
6. Medical Centre IATROS; Ljubljana Slovenia